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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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ST7LITE25F2 数据表(PDF) 50 Page - STMicroelectronics |
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ST7LITE25F2 数据表(HTML) 50 Page - STMicroelectronics |
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50 / 166 page  Interrupts ST7LITE20F2 ST7LITE25F2 ST7LITE29F2 50/166 Doc ID 8349 Rev 5 External interrupt selection register (EISR) Read/Write Reset Value: 0000 1100 (0Ch) ● Bits 7:6 = ei3[1:0] ei3 pin selection These bits are written by software. They select the Port B I/O pin used for the ei3 external interrupt according to the table below. ● Bits 5:4 = ei2[1:0] ei2 pin selection These bits are written by software. They select the Port B I/O pin used for the ei2 external interrupt according to the table below. ● Bit 3:2 = ei1[1:0] ei1 pin selection These bits are written by software. They select the Port A I/O pin used for the ei1 external interrupt according to the table below. 7 0 IS31 IS30 IS21 IS20 IS11 IS10 IS01 IS00 Table 14. External interrupt I/O pin selection ei31 ei30 I/O pin 0 0 PB0 (1) 1. Reset state 0 1 PB1 1 0 PB2 Table 15. External interrupt I/O pin selection ei21 ei20 I/O pin 0 0 PB3 (1) 1. Reset state 0 1 PB4 (2) 2. PB4 cannot be used as an external interrupt in HALT mode. 1 0 PB5 1 1 PB6 |
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